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Finding the Fourth Proportional to 758.11, 1,045.41 and 653.53

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Solution

The fourth proportional to 758.11, 1,045.41 and 653.53 is: 901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.11 : 1,045.41 = 653.53 : x
  2. Step 2: Convert to fraction form
    758.11/1,045.41 = 653.53/x
  3. Step 3: Cross multiply
    758.11x = 1,045.41 × 653.53
  4. Step 4: Simplify right side
    758.11x = 683,206.80
  5. Step 5: Solve for x
    x = 683,206.80/758.11
  6. Step 6: Final answer
    x = 901.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.